Veneering machine



(N0 Model.) 2 Sheets.-Sheet 2.

G. S. GRAF.

VENEERING MACHINE.

No. 244,048. Patented July 12,-1881.

Q) a saass f UNITED STATES PATENT OFFICE.

GEORGE S. GRAF, OF CINCINNATI, OHIO, ASSIGNOR OF ONE-HALF TO SAMUEL W. TROST, OF SAME PLACE. I

VENEERlNG-MACHINE.

SPECIFICATION forming part of Letters Patent No. 244,048, dated July 12, 1881.

Application filed March 7, 1881. (No model.)

To all whom it may concern:

Be it known that I, GEORGE S. GRAF, of Cincinnati, in the county of Hamilton and State of Ohio, have invented a new and useful Improvement in Veneering-Machines, which improvement is fully set forth in the following specification and accompanying drawings, in which Figure 1 is a side elevation of the venecringmachine. Fig. 2 is a top view. Fig. 3 is a vertical longitudinal sectional view. Fig. 4 is a face view of the glue-reservoir. Fig. 5 is a: perspective view of the heating-box. Fig.6 is an enlarged view of the journal-guide for the rollers, and Fig. 7 is a top view of the presserbrush. Fig. Sis a view of the under side of the cylinder, showing the slides.

The object of this invention is to provide a for a uniform manner of feeding the glue, and

also for evenly pressing the veneer t0 the lumber and drying it as it leaves the machine.

To this end it consists in a suitable framework provided with a series of bars longitudinallyplaced on edge,leaving a small space between. These bars compose the bed'of the machine, over which the lumber travels when in operation.

At the forward end of the machine feedrollers are placed, which conduct the lumber under a revolving brush operating within a cylinder. The upper side of the cylinder is provided with an opening and a glue-receptacle, having adjustable slides to feed the glue regularly into the cylinder containing the revolving brush. A stationary bar provided with a scraper takes the surplus glue off the lumber and distributes it after it passes the brush.

On the opposite end of the machine is a peculiarly-constructed heatingbox provided with rollers, around which is wound an endless metallic band, the journal of the lower roller passing through boxes which slide vertically in the side frames. The heating-box and rollhereinafter.

ers thusrest on the lumber and veneer. Be-

fore the veneered lumber passes under the heating-box a peculiarly-shaped brush smooths out the veneer, as will be shown more fully A movable guide secured to one side of the bed has a curved arm, which extends around the roll and reaches to the table above the heating-box, upon which the veneer rests, all of which will now be described in detail.

Referring to the drawings, A represents the frame of the machine, having suitable legs.

-A series of bars, A, placed on edge a slight distance apart, run longitudinally with the frame A, and rest on suitable cross-pieces, A, at each end. These bars form the bed of the machine, over which the lumber travels.

At the forward end of the machine is an elevated glue-reservoir, B, held in position by readily understood. The rear face, a, of the "box has an aperture, to, on the lower side.

Two horizontal slides, I), cover the opening a,

and these are adapted to slide in and out to correspond with the width of the lumber to be veneered. An additional slide, 0, working within the vertical guides 0', laps over the horizontal slides b, and this, when raised or lowered, regulates the flow of glue or the quantity. A drip-plate, d, (shown in Figs. 1 and 3,) leads from the opening a, to conduct the glue to the cylinder, hereinafterdescribed.

Beneath the glue-reservoir, and secured to the frame by screws or lfolts O on each side, is an upright or standard, 0. A transverse roll, is journaled in these uprights in such a position that the bars A forming the bed abut against the roll, and so that the upper surface of the roll D is level with the upper surface of the bars A. Directly above this roll the standard or upright (J has a vertical transverse roll, E, which rests on the lower roll, D,.and between these rolls the lumber is fed. The standard 0, further along, is provided with another vertical opening, f, which receives a similar sliding box, e. Through this sliding box the journal F of the revolving brushFpasses. A stationary cylinder or drum, F, envelops this revolving brush, and this is provided with an opening below, G, which extends along the entire length of the drum, so as to permit the periphery of the brush F to touch the lumber as it passes under the drum. In Fig. 8 the under side of the drum is shown.

G are slides secured to the drum, and are designed to be drawn from each other in operation, as shown in Fig.8, exposing the brush through the square boxing h.

F the width of the lumber veneered. On the upper side of the drum is also an opening, G,

, the entire length of the cylinder, to permit the drippin gs of glue from the plate d'to fall on the revolving brush F. A bar, H, or a scraper, composed of metal, secured in vertical guides H in the standard 0, is designed to rest on the lumber and distribute the glue evenly over the surface after it leaves the brush.

At the rear end of the machine is also an: upright, I, at each side, extending upward from the frame A. Near the base of this upright the journal J of a roller, J, is secured. The? upper surface of this roller is also level with bars A, to correspond with the roller D at the forward end of the machine. The upright I: is also provided directly above this roller with a vertical opening, g. This opening receives a boxing, h, in which opening the boxing'moves vertically. By reference to Fig. 5 this boxing audits accompaniments are shown in detail.

K represents the ends of the heating-box; These are provided at the upper ends with? two rollers, t, and the lower ends with a sin-; gle roller, 43. The journals of .this latter rollerg pass through the end pieces, K, and also, The boxes, how-% ever, are secured permanently to the end pieces, K.

L represents. the outline of the reservoir,: which contains heated water, and within the; reservoir is another roller, 70, whose journals work in slots in the end pieces, K.

An endless metallic band,M, passes around. the lower roll, 6, thence over the upper rolls, 2', and under the roll 70 within the reservoir. The roll 70 is then depressed, which can be done owing to the slots 70, and the band M made taut. Within the reservoir is a cross-bar, l, with arubber face, against which the metallic band M slides. The object of this is to dry the. band as it emerges from the heated water. inthe reservoir. I

It will thus be seen that the heating-reservoir rests wholly upon the roll J and the lumshaped, having the point in the middle of the bed, so that the lumber containing the freshlylaid veneer, in passing under the v brush, is smoothed out from the middle, thus evenly pressing the veneer onto the glued surface and preventing it from wrinkling or curling. The brush is regulated by means of the guards N and screw.

0 represents an upright, having an arm, 0, in the upper end of which is journaled a large pulley, P. The upright proper,O, is providedwith a vertical aperture, m, which contains a sliding box, m. Into this sliding box the journal of the roll a is secured.

Q represents a table, secured over the heating-box by means of legs Q, which arefastsued to the frame A. This table extends over to the large feed-roll P, and is designed to receive the veneer to be used, and from which it is fed while the machine isin operation.

To provide a means for feeding the veneer regularly, so as to cause it to register with the lumber correctly, a guard, R, is secured to the bed. This has a transverse slot, It, and a screw, R, by means of which it may be-moved toward the middle of the bed, or near the edge, to suit the varying wid th of the boards. Each side may be provided with a similar guard. An arm, S, extends up from this guard, and is bent around the feed-roll, touching the table Q. Thus the veneer, in being fed to the machine, will register exactly with the lumber,

which enters at the opposite end of the machine.

It will be noticed that the sliding boxes e, e, h, and m are capable of vertical motion. This is necessary, particularly in case of the rolls E, h,.and on, because the lumber to be veneered will frequently vary in thickness :1. sixteenth of an inch or less, although designed to be the same thickness; and while it is not absolutely required that such a machine should be capable of veneering lumber of all thick- This head is secured loosely in a socket in the boxing, so that the thread-screw'may be permitted to have a slight play up and down. A short distance above the boxing the threaded screw, is provided with a collar,W, and a spiral spring, Y, is interposed between the collar and the boxing.

At the rear end .of the bars A is a rubber lip, g, which projects slightly above the surface of the bars. The object of this will be fully stated hereinafter.

At the front end of the machine, directly under the drum F, is a receptacle, 7, for catching the drippings of the glue from the boards or from the revolving brush.

A steam-pipe leads to the space in the gluereservoir beneath the sloping bottom B, to

IIO

keep the glue heated, and the heating-box is also heated in like manner.

The operation of the machine is as follows:

The glue in the reservoir being in proper con-. dition, and the heating-box filled with water and suitably heated by steam, the machine is set in motion. It will be observed that on one side of the machine the upper roll at the;

are not stationary. Thebelts aretwisted to give the proper relative motion to the different rolls. The pulley Z,which drives the revolvingbrush, is connected independently with the countershaft, since the motion to be imparted to it must be much greater than the motion of the rolls. The guide R is then adjusted for the width and the screws U set for the thickness of lumber. The horizontal slides b b of the glue-reservoir and the slides G below the drum are drawn out to correspond with the width of the lumber. The machine being in motion, the strip of veneer is laid upon the table Q with the edge against the guide R. The end is then drawn down over the roll P, under the roll a and brush N, until the end rests against the rubber lip or retainer q at the end of the bars A. The strip 8 in Figs. 1 and 3 represents the piece of veneering. The machine is now ready for the lumber, which enters the machine between the rolls D E at the forward end of the machine and passes beneath the drum F. The brush F within the drum rotates rapidly in the direction of the movement of the board and distributes the glue over its surface. The board, after leaving the brush, passes under the bar H, which scrapes off the surplus glue and distributes it evenly. Thence the board passes over the bed and under the roll a. This latter roll then presses the veneer to the board, and both pass under the brush N, which smooths out the veneer from the center, expelling all the air between the board and veneer and preparing the same for the final operation of the presserrolls J i. The metallic band M, having been heated by continually passing through the heated water in the reservoir L, being in direct contact with the veneer, dries it as it passes through, and owing to the weight of the entire heating-box and the rolls the veneer is firmly secured to the board beneath.

I am aware that bars somewhat similar to the transverse bar H are used in certain classes of polishing or molding machines, andI therefore disclaim, broadly, the use of a metal bar, confining myself to the use of a metal bar for evening and scraping off the surplus glue.

I am also aware that it is not new to employ a metallicapron heated for various purposes, and I disclaim this, broadly 5 but I am not aware that a movable metallic band has ever before been used as a presser and drier for veneered surfaces.

Having described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. In a veneering-machine, a glue-reservoir having two compartments separated by an inclined partition, the lower compartment to receive the steam and the upper compartment for receiving the liquid glue, the rear side of the box, near the bottom, being provided with an aperture covered by two horizontal slides and having a vertically-adj ustable slide or gate lapping over the horizontal slides, all operating as and for the purpose herein set forth.

2. Inaveneering-machine,thebedcomposed of bars A, as shown, provided at the rear end with a transverse fiexiblelip or retaining-strip which projects above the surface of the bed, as and for the purpose herein set forth.

3. In a veneering-machine, a vertically-movable horizontal cylinder or drum, having along the lower side an opening provided with slides for closing the same, and having along the upper surface an opening for receiving glue from the reservoir, in combination with a revolving brush, as herein specified.

4. In a veneering-machine, a U-shaped heating-box having suitable ends, as shown, and square boxing attached to said ends, which are adapted to slide in suitable guides extending up from the frame, the heating-box being further provided with two rolls above and one below, journaled in the ends, and having also a roller journaled to the ends within the reservoir, and an endless metallic band arranged to travel over the rolls and under the roll in the reservoir, as and for the purpose herein set forth.

5. A V-shaped heating-box for containing heated water or steam, having a roll at the lower point and two rolls above, with an ad justable roll secured within the box, in combination with a movable metallic band which passes around the lower roll and the two upper rolls and under the adjustable roll within the box, substantially as herein set forth.

6. The combination of the lower roll, J, with the heating-box L, containing the endlessmetallic band resting on said roll, and capable of vertical adjustment within the guides I, as herein specified.

7. In a veneering-machine, the combination of the glue-reservoir, having an opening, a, and a drip-plate, d, with the drum F, containing the revolving brush F, as herein described.

8. In a veneering-machine, the bed A, having transverse rolls at each end, in combination with a revolving glue-brush, F, and metallic bar H for distributing the glue, as herein specified.

9. In a veneering-maohine, the bed of the machine, having stationary transverse rolls at each end, in combination with the vertically adjustable heating-box L, having the rolls t t" 7c, and the metallic band M, as herein set forth.

10. In a veneering-machine, the bed having stationary transverse rolls at each end, in combination with the vertically-adjustable brush N, as and for the purpose specified.

11. In a veneering-machine, the bed A, havin g at the rear end a flexible lip or retainingstrip, q, and stationary transverse rolls at each end, in combination with the vertically-adjustable heating-box, carrying the rolls and endless metallic band, the brush vertically adjustable, the veneer-table Q, and the guide R, having the curved guide-arm S, all operating and arranged as herein set forth. r.

In testimony that I claim the foregoing I have hereunto set my hand, this 28th'day of February, A. D. 1881, in the presence ofrwitnesses.

GEORGE S. GRAF.

\Vitnesses:

J. S. ZERBE, O. J. BAILEY. 

